Impact Factor
3.30
Estimated influence, citation density, publishing volume, and citation integrity from the analytics table.
Volume, recency, access pattern, and citing-community signals from the journal analytics record.
Recent article records with DOI-first linking and condensed abstracts.
Supplements accompany some vols.
Also issued online.
Microfilm. v. 14 (1920)-46 (1951 July), v. 47 (1953)-56 (1962). 36 microfilm reels : negative ; 35 mm.
Vol. 85, no. 1 (1991)19920910 Notice not published Printed on acid-free paper